Improvement in anti-friction-roller journal-bearings



Nrn-3D STATES PATENT Orrica ENOS TURNER, OF CHICAGO, ILLINOIS, ASSIGNOR TO WM. S. JOHNSTON, JR.,

` OF SAME PLACE.

IMPROVEMENT lN ANTl-FRlCTlON-ROLLER JOURNAL-BEARINGS.

Specification forming part of Letters Patent No. 10,47 l, dated November 3, 1863.

, sents a sectional view of my invention, taken at the line a' in Fig. 2. Fig. 2 represents an end view of the same, and Fig. 3 is a perspective view of the rollers with their frame, the outer casing being removed.

The object ot' my invention is to obtain antifriction rollers which shall be of superior strength and durability, and not liable to get out ol' repair, and which at the same time shall produce the effect aimed at by all antifriction rollers-namely, the decrease of friction-in a much more perfect and effective manner than has heretofore been attained.

To enable those skilled in the art to construct and make use of my invention, I will now proceed to describe the same with particularity.

A in Fig. 1 represents a portion of the pulley or block in which my antii'rictiou rollers are placed, and B represents the metallic casing in which the rollers with their frame are inclosed. parts, one part being fastened to each side of the pulley-block by the screws marked b, as is clearly shown in Fig. l. It is also provided at the outer ends thereof with a dauge projecting outward and inward, the outward part ol this tlange being sunk into A, as shown 1n the drawings, and the inward part projecting toward the center prevents the rollers from sliding or falling out.

The rollers themselves (marked u in the drawings) are of brass or other suitable metal, and are kept in place With respect to each other by the circular end pieces or frames (marked O) and the small shaftsor journals passing through them, (marked c.) These rollers, when arranged in the manner shown in Fig. 3, nt loosely in the interior of the casing B, but are prevented from sliding out by This casing B is constructed in two' the projection or flange aforesaid. The rollers a are perforated throughl the center from end to end, as is clearly shown in the sectional views thereof in Fig. 1, and are supported upon the small shafts or Arods c, which pass through the perforations in the rollers and are tirmly fastened in the circular frames O, at each end thereof, both ends of said rods c being countersunkin said frames, thereby rendering the combination of the rollers and frames very strong, and not liable to give Way or get out of repair. The said journals or rods c are provided at each end with a projection or shoulder,which prevents the frames O from pressing or being crowded against the ends of the rollers and thereby impeding their i'ree motion. I also construct the holes or perforations through the rollers a considerablylarger than the rods c, which pass through said perforations, so that when pressure is applied the upper part of the casing presses down upon the upper rollers, and the rollers themselves rest upon the shaft, passing through the space S, in Fig. 2, and thus the pressure is entirely removed from the rods c, and is divided and distributed equally upon the central shaft and the upper interior vsurface of the casing B, thereby materially decreasing the friction, whereas if the perforations through the rollers fitted closely to the rods c this result could not be obtained.

Having thus described my improved antifriction rollers, I will now state concisely what l claim as my'invention and desire the secure by Letters Patent- The combination and arrangement of the metallic frictional casing B, the rollers a,'the supporting-shafts c, and circular frames O, when said shafts are provided with shoulders to prevent the frames O from pressing against.

the ends of the rollers, and are provided at each end with heads countersunk in said frames O, and When the perforations through' said rollers are made larger than the shafts c, so that the friction may be thrown off from the said shafts c and come upon the casing B and the journal, substantially` as herein speci- 

